
/* For devices with a width of 600px or less */
@media (max-width: 1200px) {
   .littlebox{
	margin-left: 0!important;
	margin-bottom: 15px;
	margin-top: 15px;
   }
}
.mainbox{
	display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}
.top-right {
	position: absolute;
	top: 20px;
	right: 20px;
}

.top-right ul li {
	float: left;
	margin-right: 15px;
	font-family: 宋体;
}

#main {
	/* position: absolute; */
	top: 135px;
	/* margin: 0 267.6px; */
	border: 1px solid black;
	padding: 20px 0px;
	width: 80%;
	margin:135px auto;
}

.littlebox {
	width: 206px;
	float: left;
	margin-left: 20px;
	border: 1px solid black;
	position: relative;
}

.littlebox li {
	width: 206px;
	height: 46px;
	float: left;
	text-align: center;
	line-height: 50px;
	font-family: 宋体;
	color: rgb(68, 123, 103);
	background-color: rgb(231, 245, 235);
	font-size: 1.25rem;
	font-weight: bold;
	transition: all .5s;
}
.littlebox img{
	transition: all .5s;
}
.littlebox :hover img{
	transform: scale(1.05); /* 稍微放大按钮 */
}
.littlebox li:hover{
	transform: scale(1.05); /* 稍微放大按钮 */
}
.book_list {
	width: 206px;
	float: left;
	height: 264px;
}

.contant1 img {
	height: 200px;
	width: 160px;
}

.contant1 div {
	padding: 20px 25px;
	text-align: center;
}

#zuo,#you{
	width: 0;
	height: 0;
	border: 10px solid;
	border-color: transparent rgb(190, 240, 204) transparent transparent;
	position: absolute;
	top: 210px;
	left: -2px;
	transition: all .5s;
}
#you{
	border-color: transparent transparent transparent rgb(190, 240, 204);
	left: 192px;
}
#zuo:hover{
	border-color: transparent rgb(68, 123, 103) transparent transparent;
	transform: scale(1.25); /* 稍微放大按钮 */
	cursor: pointer;
}
#you:hover{
	border-color: transparent transparent transparent rgb(68, 123, 103);
	transform: scale(1.25); /* 稍微放大按钮 */
	cursor: pointer;
}